Adapter for making connection into a container through a pierceable top



FIG. 1 is a front view in elevation of an adapter for making connection into a container through a pierceable top;

FIG. 2 is a side view in elevation of the adapter shown in FIG. 1;

FIG. 3 is a top plan view of the adapter shown in FIG. 1; and

FIG. 4 is a bottom plan view of the adapter shown in FIG. 1. 

The ornamental design for a wound drainage system as shown and described. 